<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>

            </el-row>
            <!-- <pre>
              {{ scope.row }}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
            <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
      >
      <!-- 内容主题区域 -->
      <el-form :model="addRole" :rules="addRolemRules" ref="addRoleRef" label-width="90px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRole.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRole.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoleList">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
      >
      <el-form ref="editRoleRef" :model="editRoleForm" label-width="90px" :rules="editFormRules">
        <el-form-item label="角色ID">
          <el-input v-model="editRoleForm.roleId" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
      >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="Treeprops"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有列表数据
      roleList: [],
      addDialogVisible: false,
      addRole: {
        roleId: '',
        roleName: '',
        roleDesc: ''
      },
      addRolemRules: {
        roleName: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 2, max: 6, message: '用户名的长度在2-6个字符之间', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 2, max: 10, message: '用户名的长度在2-10个字符之间', trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      // 查询到的角色信息
      editRoleForm: {},
      // 修改角色表单的验证规则对象
      editFormRules: {
        roleDesc: [
          { required: true, message: '角色描述', trigger: 'blur' },
          { min: 2, max: 15, message: '用户名的长度在2-15个字符之间', trigger: 'blur' }
        ],
        roleName: [
          { required: true, message: '角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '用户名的长度在2-10个字符之间', trigger: 'blur' }
        ]
      },
      // 控制分配权限对话框的显示与影藏
      setRightDialogVisible: false,
      // 所有的权限数据
      rightslist: [],
      // 树形控件的绑定对象
      Treeprops: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前分配角色id
      roleId: ''

    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取数据额列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
      // console.log(this.roleList)
    },
    addDialogClosed() {
      this.$refs.addRoleRef.resetFields()
    },
    async addRoleList() {
      this.$refs.addRoleRef.validate(async valid => {
        // console.log(valid) // false
        if (!valid) return
        // 可以发起网络请求
        const { data: res } = await this.$http.post('roles', this.addRole)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败')
        }
        this.$message.success('添加用户成功')
        // 隐藏添加用户的输入框
        this.addDialogVisible = false
        // 重新获取用户列表
        this.getUserList()
      })
    },
    // 监听用户对话框关闭事件
    editDialogClosed() {
      this.$refs.editRoleRef.resetFields()
    },
    // 修改角色的对话框
    async showEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editRoleForm = res.data
      // console.log(this.editRoleForm)
      this.editDialogVisible = true
    },
    // 修改角色数据的并提交
    editRoleInfo() {
      this.$refs.editRoleRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        // 发起修改用户的请求
        const { data: res } = await this.$http.put('roles/' +
        this.editRoleForm.roleId,
        { roleName: this.editRoleForm.roleName, roleDesc: this.editRoleForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getUserList()
        // 提示成功
        this.$message.success('更新用户信息成功')
      })
    },
    async removeRoleById(id) {
      // 弹框询问是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除，则返回值为确认字符串
      // 取消为cancel 确认为confirm
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getUserList()
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // this.$message.success('删除成功')
      role.children = res.data
    },
    // 分配权限对话框
    async showSetRightDialog(role) {
      // console.log(role)
      this.roleId = role.id
      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      // console.log(this.rightslist)
    },
    // 通过递归的方式取的角色下所有三级权限的id，并保存到defKeys
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点（我要的就是三级，三级是没有子节点的）
      if (!node.children) {
        return arr.push(node.id)
      }
      // console.log(node.id)
      // 递归就是在不停的找没有子节点的三级权限
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')
      // console.log(idStr)

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限数据失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
